But smackdaddy, those are imperial gallons. Way way bigger than the ones you are thinking of. (VBG)

When I first read the report, I simply assumed - as ScottUK mentioned - that had to be a misprint or typo, or that there had to be a 0 or two omitted, or perhaps something was lost in translation from Flemish... :-)

Inconceivable, that 1 gph could precipitate such a cause for concern...